I'm currently stuck on the first quest after the tutorials "City Expansion". I entered the dungeons Thousand Cuts, Vince's Vault and The BAAdlands. Killed all the bosses and am now stuck because the quest isn't marked as complete. Is there something extra I have to do? A "complete quest" button I'm missing? As I now only have access to the first 3 dungeons and they're pretty unchallenging.

Note: When I highlight the quest no flags appear over the dungeons anymore